Try-square.



UNITE STAWENT OFFICE.

TRY-SQUARE.

1,037,155. Specification of Letters Patent Patented Aug. 27,1912. Application filed March 1, 1912. Serial No. 680,936.

To all whom it may concern: slightly away from the handle and pressed Be it known that we, CHARLES Gr. LARSON to fold. and PETER A. Lesson, citizens of the United The blade is frictionally held against its States, residents of Burlington, in the county h dl by th i et. d by th l t ring, of Des Moines and State of Iowa, have made so that its angular adjustment to varying a certain new and useful Invention 1n Trydegrees with relation to the handle is se- Squares; and we declare the following to be r f u ing or comparing angles, a full, clear, and exact description of the It is preferred when the blade has been same, such as will enable others skilled in adjusted to the half-way point, or forty-five the art to which it appertains to make and degrees with relation to the handle, that it use the invention, reference being had to the contacts at its edge with a shoulder 12 of accompanying drawlngs, and to letters or the pin, as shown in Fig. 2 of the drawings figures of reference marked thereon, which in full lines, the pin in this way forming a form a part of this specification. stop for the blade. In carrying out this Figure 1 is a side view of our try squareconstruction the pin is located at the handle The folded and unfolded portions, of the corner 13, and the plate spring extends from blade being shown in dotted lines Fig. 2 is the rivet toward said corner and over the a section on the line 2-2, Fig. 1. in in an oblique manner. And in order The invention has relation to folding trythat the blade may not be folded too easily squares, and it consists in the novel conwhen at ninety degrees with relation to the struction and combinations of parts as herehandle, the perforation wall engagesa shoulinafter set forth.

der 1 1 of the pin opposite the bevel 10. In the accompanying drawings, illustrat- It is desirable to have the rivet head act ing the invention, the numeral 1 designates as a stiffener for the spring, to resist out- 5 the handle member of the square and 2 is ward movement thereof, said head being the blade member, pivoted to the handle by somewhat enlarged and extending over the means of a rivet or pivot pin 3, having a inner end portion of said spring for this head 4 and a stem 5 upset at 6 to bind the purpose. members together. The inner end of the blade is preferably l0 Located between the rivet head and the rounded as shown at 15, and graduated at blade is a plate spring 7, fastened at its 16 for comparison with an indicator line ner end to and fixed with relation to said 17 of the handle in the measurement ,of

angles.

head, the stem of the rivet pin being in turn fixed with relation to said handle, said plate The invention is of simple and durable nature, capable of economical manufacture,

35 spring bearing upon said blade and serving to press it closely against the handle at all and will well serve the purposes for which times. it is intended.

The handle 1 is provided with a laterally A means is provided to hold the spring projecting pin 8, over which the outer end of plate stationary with relation to the rivet 40 the plate spring extends, and the blade is propin, consisting preferably of a stop pin or vided with a perforation 9 which is designe projection 18 of the rivet head engagin a to engage with said pin when the blade is seat in said plate; and a means is provided squared or at an angle of ninety degrees to hold the rivet stationary with relation to with relation to the handle. In order that the handle member 1, consisting preferably 45 the blade may pass over the pin sufficiently of a similar stop pin or projection 19, en-

to allow the perforation to engage the same, gaging a seat in said member. said pin is beveled slightly at its outer end Having thus described our invention, what at one side at 10, the blade rising upon said we claim as new and desire to secure by Let-- bevel, the plate spring bein at the same ters Patent is:

50 time bent outward or put un or greater ten- A try-square, consisting of a handle memsion, and the blade finally falling again or her, a blade member, a pivot pin connecting snapping home through pressure of said the members, and a lateral pin upon one 0 spring upon said pin, where it is securely the members, the other member having a held against accidental displacement. perforation for engagement with said pin 55 When the blade is to be folded it is lifted when the members are at an angle of ninety degrees with relation to each other, said In testimony whereof we afilx our sign lateral pln having engagement With the edge tures, in presence of two Witnesses.

of and forming a stop for said blade When CHARLES G. LARSON. the members are at an angle of forty-five PETER A. LARSON. 5 degrees, and a plate spring confined by said Witnesses:

pivot pin and having extension over said C. H. MOHLAND,

lateral pin to press the members together. JOSEPHINE WEDERTZ.

v Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, D. 0. 

